The gold colour is that of the Divine Truth, whether intuitive or overmind. The golden light is the light of the Divine Truth which comes out from the supramental sunlight and modified according to the level it crosses, creates the ranges from overmind to higher Mind; i.e., the supramental Light passing through the overmind, Intuition, etc. and becoming the Light of Truth in each of these things. When it is golden red it means the same modified supramental-physical Light, — the Light of Divine Truth in the physical. Gold indicates at its most intense something from the supramental, otherwise overmind truth or intuitive truth deriving ultimately from the supramental Truth-consciousness.
Mahakali in the higher planes appears usually with the golden colour. Mahakali and Kali are not the same. Kali is a lesser form.